It’s often said that if Facebook were a country, it would be the largest on earth, with a current population of 2.2 billion.

Now, the company is tapping an actual politician to help lead that digital nation — bringing on Nick Clegg, the former deputy prime minister of the U.K., as its head of global policy and communications.

Clegg — who was the U.K.'s second most-powerful political leader from 2010 to 2015 — will be moving to California to succeed Elliot Schrage, who had held the position for the past decade. Unlike Schrage, a Harvard-educated lawyer who had previously worked at Google, Clegg brings an outsider’s eye as a non-American and an insider’s perspective as a former member of the European Parliament.

Clegg’s hiring comes as Facebook seeks to navigate increasingly delicate matters of diplomacy with governments around the world, with regulators bringing fresh scrutiny to Facebook over everything from its use of customer data to how it intends to safeguard the integrity of democratic elections.

“Our company is on a critical journey,” said Sheryl Sandberg, Facebook’s chief operating officer, in a Facebook post Friday announcing the move. “The challenges we face are serious and clear and now more than ever we need new perspectives to help us though this time of change.”

Clegg had been speaking to Sandberg and chief executive Mark Zuckerberg for months about the role, he said in a Facebook post.

“Throughout my public life I have relished grappling with difficult and controversial issues and seeking to communicate them to others,” he said. “I hope to use some of those skills in my new role.”

This is not the first time Facebook has turned to those with a political background for help. But Clegg is perhaps the highest-profile politico to take a leadership position in the company’s history, underscoring the gravity of Facebook’s situation as it faces mounting criticism from European policymakers.

In seeking to reverse Facebook’s fortunes, particularly in Europe, Clegg’s political instincts will be put to the test.

Once hailed as a rising star in British politics, Clegg brought his relatively small Liberal Democrat party to prominence in the country’s 2010 elections when he sharply criticized the Conservative party’s David Cameron. Cameron’s party went on to win the most seats in the general election, but not enough to form a governing majority — giving the charismatic Clegg an opening to form a novel and unexpected political partnership with the Conservatives.

But despite generating optimism for a new future with that alliance, Clegg soon found himself on the wrong end of public opinion. He was forced to back away from a party pledge to reduce college costs, ultimately voting with Conservatives to raise the maximum amount students could be expected to pay for their education as Britons protested in the streets.

Clegg and his party were trounced in the next election — losing 86 percent of their seats in Parliament. Clegg conceded it was a “cruel and punishing night” for the Liberal Democrats.

But Clegg’s defenders say his broader experience could be a boon to Facebook as the embattled company seeks to repair its ties to policymakers.

“There will be few Anglo-Saxon voices that have as much resonance in Europe as Nick’s,” said Tim Gordon, the former chief executive of the Liberal Democratic party who first began working with Clegg in 2012. "He’s smart, speaks multiple languages and has built strong relationships with leaders across the continent.”

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Brian FungBrian Fung covers business and technology for The Washington Post. Before joining The Post, he was the technology correspondent for National Journal and an associate editor at the Atlantic. Follow